Mixed metal layered hydroxide-clay adducts as thickeners for water and other hydrophylic fluids
First Claim
1. A composite comprising the adduct or reaction product of at least one mineral clay with at least one monodispersed monolayer crystalline mixed metal layered hydroxide conforming essentially to the empirical formula
wherem represents the number of Li ions present;
the said amount being in the range of zero to about 1;
D represents divalent metals ions;
withd representing the amount of D ions in the range of zero to about 4;
T represents trivalent metal ions;
A represents monovalent or polyvalent anions ofvalence -n, other than OH-, with a being the amount of A anions; and
where (m+2d+3+na) is equal to or greater than 3.
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Accused Products
Abstract
Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide of the formula Lim Dd T(OH)m+2d+3+na) Aan, where D is a divalent metal, such as Mg, T is a trivalent metal, such as Al, and A represents other monovalent or polyvalent anions, the formula being described in detail in the disclosure.
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Citations
22 Claims
- 1. A composite comprising the adduct or reaction product of at least one mineral clay with at least one monodispersed monolayer crystalline mixed metal layered hydroxide conforming essentially to the empirical formula
- space="preserve" listing-type="equation">Li.sub.m D.sub.d T(OH).sub.(m+2d+3+na) A.sub.a.sup.n,
where m represents the number of Li ions present;
the said amount being in the range of zero to about 1;D represents divalent metals ions;
withd representing the amount of D ions in the range of zero to about 4; T represents trivalent metal ions; A represents monovalent or polyvalent anions of valence -n, other than OH-, with a being the amount of A anions; and where (m+2d+3+na) is equal to or greater than 3. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- 21. A method for reacting a mineral clay with a monodispersed monolayer mixed metal layered hydroxide of the formula
- space="preserve" listing-type="equation">Li.sub.m D.sub.d T(OH).sub.(m+2d+3+na) A.sub.a.sup.n,
where m is an amount in the range of zero to about 1; D is a divalent metal ion, with d in the range of zero to about 4; T is a trivalent metal ion; A represents monovalent or polyvalent anions other than OH-, of valence -n, with a being the amount of A anions; (m+d) is greater than zero and (m+2d+3+na) is equal to or greater than 3, said method comprising reacting, by intimately mixing together, an aqueous gel or dispersion of said layered hydroxide with an aqueous dispersion of the clay whereby metal ions from the clay and anions from the layered hydroxide go into the aqueous solution by ion exchange of clay anions for layered hydroxide anions and whereby an adduct of the mixed metal layered hydroxide and the clay is formed. - View Dependent Claims (22)
Specification
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- Resources
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Current AssigneeSKW Polymers GmbH
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Original AssigneeThe Dow Chemical Company (Dow, Inc.)
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InventorsBurba, John L. III, Barnes, Audrey L.
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Primary Examiner(s)Lovering, Richard D.
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Application NumberUS06/752,326Time in Patent Office676 DaysField of Search252/8.5 B, 252/184, 252/315.5, 252/8.51, 252/8.512, 252/28, 252/35, 423/328 C, 501/147US Class Current516/110CPC Class CodesB82Y 30/00 Nanotechnology for material...C01B 33/26 Aluminium-containing silica...C01B 33/40 ClaysC01B 33/44 Products obtained from laye...C09K 8/145 characterised by the compos...C09K 8/845 containing inorganic compoundsC10M 113/00 Lubricating compositions ch...C10M 125/10 Metal oxides, hydroxides, c...C10M 173/02 not containing mineral or f...C10M 177/00 Special methods of preparat...C10M 2201/00 Inorganic compounds or elem...C10M 2201/02 WaterC10M 2201/0606 used as thickening agentsC10M 2201/061 Carbides; Hydrides; NitridesC10M 2201/0616 used as thickening agentsC10M 2201/062 Oxides; Hydroxides; Carbona...C10M 2201/0626 used as thickening agentsC10M 2201/063 PeroxidesC10M 2201/0656 used as thickening agentsC10M 2201/0666 used as thickening agentsView All
